NASA Scientific and Technical Aerospace Reports

20060002492 Lawrence Livermore National Lab., Livermore, CA USA
Simple Model of Delayed Neutron Emission
Cullen, D. E.; Jun. 06, 2004; 48 pp.; In English
Report No.(s): DE2005-15014319; UCRL-TR-204743; No Copyright; Avail.: National Technical Information Service (NTIS)
No abstract available
Delay; Neutron Emission
71
ACOUSTICS
Includes sound generation, transmission, and attenuation. For noise pollution see 45 Environment Pollution. For aircraft noise see also
02 Aerodynamics and 07 Aircraft Propulsion and Power.
20060000034 Institute of Sound and Vibration Research, Southampton, UK
Institute of Sound and Vibration Research Annual Report 2005
Nelson, P. A.; [2005]; 115 pp.; In English; Original contains black and white illustrations; Copyright; Avail.: Other Sources
Research within ISVR continues to strengthen with yet another increase in research funding during the reporting year.
Steps are also being taken to enhance our activities still further through the appointment of junior staff in a number of
strategically important areas. Funding has been agreed through the Strategic Planning process within the University for new
appointments in underwater acoustics, computational aeroacoustics, audio signal processing, and human response to vibration.
Many of these posts are to be funded from external sources in addition to the contributions made through the allocation
received by the ISVR from the University. It will be vitally important for the future well-being of the Institute that researchers
are appointed who are capable of contributing to research of world-leading quality. It will also be vital that the appointments
made will strengthen the Institute’s contribution to the forthcoming Research Assessment Exercise (RAE) to be undertaken
by HEFCE in 2008. It is worth mentioning, that in accordance with University policy, the Institute undertook an exercise to
monitor the quality of its research outputs during the Strategic Planning round held in the Spring of 2005. The Institute
consulted eight external referees to moderate the judgements made within the Institute of the quality of our research outputs.
This proved to be a most useful exercise and confirmed that ISVR is well placed to produce a return of good quality to the
next RAE. It will be vital to maximize the number of publications that can be judged to be world-leading if the ISVR’s
allocation of research funding through the HEFCE QR (Quality Research) mechanism is to be sustained. Much of our research
in the field of structural dynamics continues to be undertaken in areas of traditional strength, including further work on
numerical and analytical methods, especially with regard to bridging the gap between low frequency finite element models and
high frequency methods based on statistical energy analysis. Research in this area has the potential to yield real practical
benefits to engineers working in this field, especially with respect to the quantification of uncertainty when making predictions
based on numerical methods. It is very satisfying to see our strength in railway noise and vibration result not only in research
outputs of high quality, but also in a high level of external visibility and recognition for our expertise in this area. Work in
the automotive field is focusing on suspension dynamics and problems of vibration isolation using passive, active and
semi-active methods. The dynamics of road tire interaction and tire noise radiation is also attracting considerable attention.
It will continue to be important to build both new industrial links in this area and to strengthen existing relationships. Other
work on fatigue pipe vibration, smart structures, active control and shock complete the comprehensive portfolio for activities
in the area of dynamics. As mentioned elsewhere, the forthcoming construction of the new ISVR building also offers a good
opportunity to relocate and improve our facilities for experimental structural dynamics. The Fluid Dynamics and Acoustics
Group have this year been outstandingly successful in attracting major research funding, especially for work in the field of
aeroacoustics, through their participation in a number of EU-funded research programs. The traditional areas of study in this
field continue to attract attention with significant programs of work on jet mixing noise, fan noise, duct acoustics, and on
advanced measurement techniques. The central importance for the aerospace industry of reducing environmental pollution is
the main driver behind these activities and these difficult problems are being tackled with an ever increasing level of
sophistication. The application of numerical methods to aeroacoustics continues to be a fertile area of research and numerically
based prediction teciques are being used with increasing levels of confidence in the aerospace industry. Our close relationship
with Rolls-Royce plc through the University Technology Center for Gas Turbine Noise continues to be pivotal in promoting
these research developments. Great progress has also been made during the last year in the field of underwater acoustics with
a strategic relationship being built with DSTL. It will be very important to build further on this relationship during the
forthcoming years as the opportunities for work in this area grow significantly as a result of new mechanisms for funding
research relevant to national defence priorities. It should also be noted that collaborations with other Schools, especially the
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